I'll second the AAA advice. A few weeks ago I needed to rent a car at EWR over Memorial Day weekend. At the Hertz website, I tried just about every CDP# and PC# that I could find and the best price I could get was around $80/weekend day for a mid-size car. Then went to AAA website and reserved a car for $35/day! (When you book at the AAA website, it will give you a link to every AAA Hertz coupon that's available.) Went back to Hertz site and with the exact same information still got the $80 price. I made sure my Club Gold # was in my AAA profile and when I arrived at EWR, my name was in lights!